Allow custom metrics implementations on Android.

webrtc/api/android/java/src/org/webrtc/CameraEnumerationAndroid.java

 /*
  *  Copyright 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 package org.webrtc;
 
 import static java.lang.Math.abs;
 
 import android.graphics.ImageFormat;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.Comparator;
 import java.util.List;
-import org.webrtc.Metrics.Histogram;
 
 @SuppressWarnings("deprecation")
 public class CameraEnumerationAndroid {
   private final static String TAG = "CameraEnumerationAndroid";
 
   static final ArrayList<Size> COMMON_RESOLUTIONS = new ArrayList<Size>(Arrays.asList(
       // 0, Unknown resolution
       new Size(160, 120), // 1, QQVGA
       new Size(240, 160), // 2, HQVGA
       new Size(320, 240), // 3, QVGA
@@ skipping 166 matching lines @@
   }
 
   // Helper method for camera classes.
   static void reportCameraResolution(Histogram histogram, Size resolution) {
     int index = COMMON_RESOLUTIONS.indexOf(resolution);
     // 0 is reserved for unknown resolution, so add 1.
     // indexOf returns -1 for unknown resolutions so it becomes 0 automatically.
     histogram.addSample(index + 1);
   }
 }